It hasn't been formally announced but it is typically the second full week of the monthplanning around that at this point carries a small amount of risk

"Every time there is a change in the game it seems the general reply is a complaint about the changes before they ever happen. However every time the game changes we use strategy and adapt to the changes and we get used to them. .....without these changes, the game would become boring." -captaindirty 10/31/2017